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Share-based payments (Tables) | 6 Months Ended
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Jun. 30, 2022
Share-based payments |
Schedule of movements in the number of share options | The movements in the number of EMI share options during the period were as follows:
​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31,
​ | ​ | 2022 | ​ | 2021
​ | ​ | Number | ​ | Number
Outstanding, start of period |  | 19,670 |  | 16,817
Granted during the period |  | — |  | 3,147
Grant arising due to scheme modification |  | 23,213,933 |  | —
Forfeited during the period |  | (1,576,948) |  | (294)
Outstanding, end of period |  | 21,656,655 |  | 19,670
Schedule of movements in the weighted average exercise price of share options | The movements in the weighted average exercise price of share options during the period were as follows:
​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31,
​ | ​ | 2022 | ​ | 2021
​ | ​ | £ | ​ | £
Outstanding, start of period |  | 308.06 |  | 143.28
Granted during the period |  | — |  | 1,178.94
Grant arising due to scheme modification |  | 0.23 |  | —
Forfeited during the period |  | 0.83 |  | 204.00
Outstanding, end of period |  | 0.19 |  | 308.06
Schedule of share options outstanding | Details of share options outstanding at the end of the period are as follows:
​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31,
​ | ​ | 2022 | ​ | 2021
Weighted average exercise price (£) |  | 0.19 |  | 308.06
Number of share options outstanding |  | 21,656,655 |  | 19,670
Expected weighted average remaining vesting period (years) |  | 2.64 |  | 1.12
Schedule of fair value of options granted | The option pricing model used was Black Scholes and the main inputs are set out in the table below.
​ | ​ | ​ | ​ | ​
​ |  | June 30, | ​ | December 31,
​ | ​ | 2022 | ​ | 2021
Average share price at date of grant (£) |  | 5.38 | ​ | 492.42
Expected volatility (%) |  | 50.00 | ​ | 50.00
Vesting period in years |  | 2.75 | ​ | 4.00
Risk-free interest rate (%) |  | 1.25 | ​ | 0.28

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- Definition The disclosure of information about indirect, by reference to the fair value of the equity instruments granted, measurement of the fair value of goods or services received as consideration for the entity's share options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 47 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The disclosure of the number and weighted average exercise prices of share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The disclosure of the number and weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_d&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The disclosure of the general terms and conditions of share-based payment arrangements. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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